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Binary compound. A binary compound is a chemical compound that contains exactly two different elements. Examples of binary ionic compounds include calcium chloride (CaCl2), sodium fluoride (NaF), and magnesium oxide (MgO), whilst examples of binary covalent compounds include water (H2O), and sulfur hexafluoride (SF6)
If they are both non-metals (such as carbon and oxygen) they will form a covalent compound (such as carbon dioxide, CO 2). If one is a metal (like sodium) and the other a non-metal (like fluorine), they will form an ionic compound (such as sodium fluoride, NaF).o decide if a binary compound has ionic or covalent bonding, first locate the two elements concerned in the Periodic Table and decide if they are metals (shown in blue) or non-metals (shown in pink).